Influence of the Measure on Simplicial Quantum Gravity in Four Dimensions

Details Influence of the Measure on Simplicial Quantum Gravity in Four Dimensions Influence of the Measure on Simplicial Quantum Gravity in Four Dimensions

1992-04-22

arxiv.org/abs/hep-lat/9204010v1

Phys.Rev.Lett.69:713-716,1992

Physics

High Energy Physics

High Energy Physics - Lattice

12pgs

Scientific paper

10.1103/PhysRevLett.69.713

We investigate the influence of the measure in the path integral for Euclidean quantum gravity in four dimensions within the Regge calculus. The action is bounded without additional terms by fixing the average lattice spacing. We set the length scale by a parameter $\beta$ and consider a scale invariant and a uniform measure. In the low $\beta$ region we observe a phase with negative curvature and a homogeneous distribution of the link lengths independent of the measure. The large $\beta$ region is characterized by inhomogeneous link lengths distributions with spikes and positive curvature depending on the measure.

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